Officials ended a Tuesday meeting in San Diego promising an update by the end of the year on the work of panels representing municipal, agricultural, environmental and tribal interests.
Looming shortages are predicted on the river serving some 40 million people including California and Arizona. Mexico also has a stake. A report concludes that the river might not be able to meet demands of the regional population by 2060.
Bureau of Reclamation chief Michael Connor says 2013 could be the fourth-driest year in the basin in the past 100 years. Last year was the fifth-driest.